Catalyst 3750E Switches and POE Network Cameras

Unanswered Question

Good Day All!

General question....was wondering if that are any known issues with Poe network cameras and the 3750E series. We are introducing network cameras into our business mix and the first camera that was installed looses connectivity every so often. Talked to the camera vendor and the camera configuration appears right. Should we be aware of any work a rounds or port specific configuration issues. It did happen with two different types of cameras.

Thanks for any help in advance!


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Jerry Ye Thu, 07/09/2009 - 06:49
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Hi Michael,

Can you posted the output of show power inline and show version?



Jerry Ye Thu, 07/09/2009 - 09:42
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Hi Michael,

Power looks okay. The IOS is a bit old. Also, have you tried different port on the switch?



xcz504d1114 Thu, 07/09/2009 - 05:51
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I have successfully used Axis POE cameras connected to 3750E stacks with no problems.

When you say it looses connectivity, what do you mean? The port goes down? Pings stop? Live video streams stop? Or playback stops?

Don't judge connectivity based on ping results, sometimes ping is very misleading. Playback issues is more than likely a software problem (specifically buffering video playback on the user front end). If live video stream from the camera directly is the issue, then you definately have a connectivity issue.

To verify if the port is dropping (if the camera looses power the port should drop and come back up) you should be able to look in the logs.



Thanks for the reply Craig,

It's really a funny thing, I have never seen it loose a ping when the connectivity issues happened. The picture would just freeze and give a "reconnection strategy failed - connection lost" message. I have taken that camera and tested it on other vendors switches, no problems.



xcz504d1114 Thu, 07/09/2009 - 06:40
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That does seem very odd. What IOS are you running?

As the above poster mentioned, check the power drawn as well, you can use "show power inline" to see the power consumption.

My cameras pull 4.0w, I'm running a single 750w power supply, IOS 12.2(46)SE.

My stack configurations use teh 3750E as the primary uplink with the other stack members being 3750-48PS.

Below is the IOS version then the camera port and power configs. Thanks!

Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(44)SE, RELEAS


Copyright (c) 1986-2008 by Cisco Systems, Inc.

Compiled Sat 05-Jan-08 00:29 by weiliu

Image text-base: 0x00003000, data-base: 0x01440000

ROM: Bootstrap program is C3750 boot loader

BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEC, RELEASE SOFTWARE


Interface Admin Oper Power Device Class Max


Fa3/0/30 auto on 7.0 Ieee PD 2 15.4


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